Yesika Raya Hutagaol; Debbi Petra Manahara Sitorus; Binsar Tison Gultom. Numbered Head Together Learning Model (NHT) In Improving Student Learning Outcomes in Social Sciences Subjects Class VII UPTD SMP Negeri 7 Pematang Siantar FY 2023/2024. IJIST 2023, 1, 505-518.